Теплоход курсирует между пристанями расстояние между которыми равно 175 километров собственная скорость теплохода равна 30 километров час скорость течения реки 5 километров час за какое время проходит теплоход от одной пристани до другой если плывет против течения реки
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08.08.2019 09:50
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2) 175 : 25 = 7 часов за столько проходит теплоход против течения